Stewart Butterfield got lucky building a successful product out of a failed game. Now, as he shelves another game, the Flickr co-founder thinks a collaboration tool -- Slack -- could be his second big hit.

Whether in the middle of the Pacific or on the side of the road in Mexico, Crave's Eric Mack always gets his work done. He shares a few of his best telecommutes for the benefit of the doubters among Yahoo management.